package demo;
interface IShape{
    public static final int a=1;
    public abstract void draw();
    default public void test1(){
        System.out.println("  ");
    }
    public static void test2(){
        System.out.println("  ");
    }
}
interface IA{
    void test();
}
interface IB{

}
class CA implements IShape,IA{
    @Override
    public void draw() {

    }
    @Override
    public void test() {

    }
    @Override
    public void test1(){

    }
}
class CB extends CA implements IB{

}
public class TestDemo {
    public static void main(String[] args) {

    }
}
